I am unable to add an email account to my iphone

Question

My iPhone "lost" the password to my email account. I tried reentering the password but no luck. Deleted account and reinstalled. Still said password was incorrect. I can log on to the account via the web so I know the log in is good and the account is working. I installed a daughter account on the phone and that went fine. Tried installing the troubled account on my iPad and got the same password incorrect. In addition I've done the following:
Called ISP tech support
Called Applecare
Gone to Genius Bar
Reset phone
Reset network settings
Restored phone from backup.
Checked for profiles
Made sure I was logged out of the account when installing
Checked settings in iCloud. email doesn't sync to cloud or computer.
Everybody said they'd never seen this problem and didn't have any ideas beyond what I've listed. Next thing to try is to see if I can get the account installed on an
Android device. That would prove that the problem is Apple's. I'm grasping for straws. Any ideas?
TIA

Answer 1

Make sure to get the following info for your account
Try
https://ssl.apple.com/support/mail-settings-lookup/
Or get is from Verizon
Incoming Mail Server Settings
  Account type (POP or IMAP):
  Incoming Mail Server:
  User Name:
  Password:
  Incoming server port number:
  Incoming server supports SSL? (yes or no):
Outgoing Mail Server Settings
  Outgoing mail server:
  User name:
  Password:
  Outgoing server port:
  Outgoing server supports SSL? (yes or no):
e-m Providers change this info and don't inform you.
Delete the account
Close back ground apps
Power cyc
Add the account as other, with the know good info.
If that fails restore the device and setup as new.